Very cool setup!
I find it hard to get an accurate height measurement when setup on a tripod.
Also, the height is always changing and it leaves room for human error when post-processing.
Typically, I just use a 2m fixed-height pole with a tripod to hold it level.
Simple, effective, and accurate 
http://www.geoshackdirect.com/Accessories-Supplies/Tripods/CST-QC-Aluminum-Tripod#.WJL1wvLzmLU
http://www.geoshackdirect.com/Accessories-Supplies/Gps-Poles/Sokkia-2m-Economy-GPS-Aluminum-Rover-Rod-2-Section-Sokkia-Green#.WJL1sfLzmLU
https://www.loink.com/product/145/32
1 Like